What is the best tool to cut speaker openings?
 

Jig saw?

Reciprocating body saw

So this? I have this guy, basically the same as a jig saw.

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That will work I use one of these with a skinny blade http://www.milwaukeetool.com/power-t...rdless/2420-20

Dremel Trio with the guilde adaptor to make a perfect circles. Depending on location and room to use it. Done a bunch of them with it, I will add..

You can also buy the correct size hole saws as well but they can get expensive, the bigger diameter the more they cost.

Are you guys talking about new holes or existing holes needed enlargement? I'm curious about the latter, need to fit some 7.7's where 6.5's went.

Yes pwraddr

roto zip or dremel

Am I crazy? I use a 6 or 7 inch hole saw. A perfectly round opening. I thought this was the only way.

How do you guys cut thru the vinyl without tearing it to shreds with a jigsaw?

I use a single armed adjustable hole saw. I cut a piece of wood to span the opening from the inside. Then I find the center and mark it. I center the hole saw on the X and go to town.

20 years of audio experience has taught me that tip. A perfect hole every time.